package com.middleand.mobile.rccar.framents;

import java.util.Set;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ListView;
import android.widget.TextView;

import com.middleand.mobile.rccar.R;

/**
 * A placeholder fragment containing BT Console Application view.
 */
public class DeviceListFragment extends Fragment {
		 // Debugging
	    private static final String TAG = "DeviceListActivity";
	    private static final boolean D = true;
	
	    // Return Intent extra
	    public static String EXTRA_DEVICE_ADDRESS = "device_address";
	
	    // Member fields
	    private BluetoothAdapter mBtAdapter;
	    private ArrayAdapter<String> mPairedDevicesArrayAdapter;
	    private ArrayAdapter<String> mNewDevicesArrayAdapter;
		
		public DeviceListFragment() {
			
		}

		

		@Override
		public View onCreateView(LayoutInflater inflater, ViewGroup container,
				Bundle savedInstanceState) {
			
			 View rootView = inflater.inflate(R.layout.fragment_devicelist, container,
					false);

	        // Initialize the button to perform device discovery
	        Button scanButton = (Button) rootView.findViewById(R.id.button_scan);
	        scanButton.setOnClickListener(new OnClickListener() {
	            public void onClick(View v) {
	                doDiscovery();
	                v.setVisibility(View.GONE);
	            }
	        });

	        // Initialize array adapters. One for already paired devices and
	        // one for newly discovered devices
	        mPairedDevicesArrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.device_name);
	        mNewDevicesArrayAdapter = new ArrayAdapter<String>(getActivity(), R.layout.device_name);

	        // Find and set up the ListView for paired devices
	        ListView pairedListView = (ListView) rootView.findViewById(R.id.paired_devices);
	        pairedListView.setAdapter(mPairedDevicesArrayAdapter);
	        pairedListView.setOnItemClickListener(mDeviceClickListener);

	        // Find and set up the ListView for newly discovered devices
	        ListView newDevicesListView = (ListView) rootView.findViewById(R.id.new_devices);
	        newDevicesListView.setAdapter(mNewDevicesArrayAdapter);
	        newDevicesListView.setOnItemClickListener(mDeviceClickListener);

	        // Register for broadcasts when a device is discovered
	        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
	        getActivity().registerReceiver(mReceiver, filter);

	        // Register for broadcasts when discovery has finished
	        filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
	        getActivity().registerReceiver(mReceiver, filter);

	        // Get the local Bluetooth adapter
	        mBtAdapter = BluetoothAdapter.getDefaultAdapter();
	        
	        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter(); 
	        if(adapter != null) {
	            if(adapter.getState() == BluetoothAdapter.STATE_ON) {
	                adapter.disable();
	            } else if (adapter.getState() == BluetoothAdapter.STATE_OFF){
	                adapter.enable();
	            } else {
	               Log.w(TAG, "Undefined BT state="+ String.valueOf(adapter.getState()));
	            } 
	        
	        	// Get a set of currently paired devices
	        	Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();

	        	// If there are paired devices, add each one to the ArrayAdapter
	        	if (pairedDevices.size() > 0) {
	        		rootView.findViewById(R.id.title_paired_devices).setVisibility(View.VISIBLE);
	        		for (BluetoothDevice device : pairedDevices) {
	        			mPairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
	        		}
	        	} else {
	        		String noDevices = getResources().getText(R.string.none_paired).toString();
	        		mPairedDevicesArrayAdapter.add(noDevices);
	        	}
	        }
			return rootView;
		}

	    

	   @Override
	public void onDestroy() {
	
		   super.onDestroy();

	        // Make sure we're not doing discovery anymore
	        if (mBtAdapter != null) {
	            mBtAdapter.cancelDiscovery();
	        }

	        // Unregister broadcast listeners
	        getActivity().unregisterReceiver(mReceiver);
	    }

	    /**
	     * Start device discover with the BluetoothAdapter
	     */
	    private void doDiscovery() {
	        if (D) Log.d(TAG, "doDiscovery()");

	       
	        // Turn on sub-title for new devices
	        getView().findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);

	        // If we're already discovering, stop it
	        if (mBtAdapter.isDiscovering()) {
	            mBtAdapter.cancelDiscovery();
	        }

	        // Request discover from BluetoothAdapter
	        mBtAdapter.startDiscovery();
	    }

	    // The on-click listener for all devices in the ListViews
	    private OnItemClickListener mDeviceClickListener = new OnItemClickListener() {
	        public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
	            // Cancel discovery because it's costly and we're about to connect
	            mBtAdapter.cancelDiscovery();

	            // Get the device MAC address, which is the last 17 chars in the View
	            String info = ((TextView) v).getText().toString();
	            String address = info.substring(info.length() - 17);

	            // Create the result Intent and include the MAC address
	            Intent intent = new Intent();
	            intent.putExtra(EXTRA_DEVICE_ADDRESS, address);

//	            // Set result and finish this Activity
//	            parent_activity.setResult(Activity.RESULT_OK, intent);
//	            parent_activity.finish();
	        }
	    };

	    // The BroadcastReceiver that listens for discovered devices and
	    // changes the title when discovery is finished
	    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
	        @Override
	        public void onReceive(Context context, Intent intent) {
	            String action = intent.getAction();

	            // When discovery finds a device
	            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
	                // Get the BluetoothDevice object from the Intent
	                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
	                // If it's already paired, skip it, because it's been listed already
	                if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
	                    mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
	                }
	            // When discovery is finished, change the Activity title
	            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
//	            	getActivity().setProgressBarIndeterminateVisibility(false);
	            	getActivity().setTitle(R.string.select_device);
	                if (mNewDevicesArrayAdapter.getCount() == 0) {
	                    String noDevices = getResources().getText(R.string.none_found).toString();
	                    mNewDevicesArrayAdapter.add(noDevices);
	                }
	            }
	        }
	    };

}
